Tags: Weapon.
Type 4 20 mm Twin AA Machine Cannon was a Japanese Anti-aircraft gun. It consisted of two Type 98 20 mm guns. It was introduced in 1944 and approximately 500 guns were produced. Caliber: 20 mm Barrel length: 1.4 m (L70) Muzzle velocity: 950 m/s Range: 5500 mm Altitude: 3500 m Rate of fire: 600 round/min